html {
    overflow-y: scroll;
    vertical-align: baseline;
}

body {
    font-family: Microsoft YaHei, Segoe UI, Tahoma, Arial, Verdana, sans-serif;
    font-size: 12px;
    color: #fff;
    height: 100%;
    line-height: 1;
    background: #999
}

* {
    margin: 0;
    padding: 0
}

.demo_tb{
    width:60%;
    border-collapse: collapse;
    color:yellow;
    font-size: 15px;
    text-align: center;
}
.demo_tb,.demo_tb th,.demo_tb td{
    border:1px solid white;
}
.demo_tb th,.demo_tb td{
    padding: 3px;
}

ul,
li {
    list-style: none
}

h1 {
    font-size: 30px;
    font-weight: 700;
    text-shadow: 0 1px 4px rgba(0, 0, 0, .2);
    margin-bottom: 15px;
}

.login-box {
    width: 500px;
    margin: 220px auto;
    text-align: center;
    padding: 40px;
    background: url("../img/mask.png");
    border-radius: 10px;
}

.login-box .name,
.login-box .password,
.login-box .code,
.login-box .remember {
    font-size: 16px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, .1)
}

.el-form-item__label {
    color: white;
}

.login-box .remember input {
    box-shadow: none;
    width: 15px;
    height: 15px;
    margin-top: 25px
}

.login-box .remember {
    padding-left: 40px
}

.login-box .remember label {
    display: inline-block;
    height: 42px;
    width: 70px;
    line-height: 34px;
    text-align: left
}

.login-box label {
    display: inline-block;
    width: 100px;
    text-align: right;
    vertical-align: middle
}

.login-box .codeImg {
    float: right;
}

.login-box img {
    width: 100px;
    height: 34px;
    border: none
}

button {
    cursor: pointer;
    width: 100%;
    height: 44px;
    padding: 0;
    background: #ef4300;
    border: 1px solid #ff730e;
    border-radius: 6px;
    font-weight: 700;
    color: #fff;
    font-size: 24px;
    letter-spacing: 15px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, .1)
}

button:hover {
    box-shadow: 0 15px 30px 0 rgba(255, 255, 255, .15) inset, 0 2px 7px 0 rgba(0, 0, 0, .2)
}

.screenbg {
    position: fixed;
    bottom: 0;
    left: 0;
    z-index: -999;
    overflow: hidden;
    width: 100%;
    height: 100%;
    min-height: 100%;
}

.screenbg ul li {
    display: block;
    list-style: none;
    position: fixed;
    overflow: hidden;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1000;
    float: right;
}

.screenbg ul a {
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    display: inline-block;
    margin: 0;
    padding: 0;
    cursor: default;
}

.screenbg a img {
    display: inline;
    border: none;
    display: block;
    list-style: none;
    position: fixed;
    overflow: hidden;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1000;
    float: right;
}

.bottom {
    margin: 8px auto 0 auto;
    width: 100%;
    position: fixed;
    text-align: center;
    bottom: 0;
    left: 0;
    overflow: hidden;
    padding-bottom: 8px;
    color: #ccc;
    word-spacing: 3px;
    zoom: 1;
}

.bottom a {
    color: #FFF;
    text-decoration: none;
}

.bottom a:hover {
    text-decoration: underline;
}